package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;

@Slf4j
@Service
public class UserServiceImpl implements UserService {
//    微信服务接口地址 小程序登录
    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    WeChatProperties weChatProperties;

    @Autowired
    UserMapper userMapper;

    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {
//        HashMap<String, String> map = new HashMap<>();
////  调用微信接口服务，获得当前微信用户的openid
//        map.put("appid", weChatProperties.getAppid());
//        map.put("secret",weChatProperties.getSecret());
//        map.put("js_code", userLoginDTO.getCode());//微信用户的授权码
//        map.put("grant_type","authorization_code");
//        String json = HttpClientUtil.doGet(WX_LOGIN, map);//返回时
//        todo com.alibaba.fastjson.JSON 在java中转换json对象
//        JSONObject jsonObject = JSON.parseObject(json);
//        String openid = jsonObject.getString("openid");
//        判断是否正常获取

        String code = userLoginDTO.getCode();
        String openid = getOpenid(code);
        if (openid == null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
//        判断用户是否为新用户
        User user = userMapper.getByOpenid(openid);
        if (user == null){
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }
        log.info("user={}",user);
        return user;
    }

    /**
     * 调用微信接口服务，获得当前微信用户的openid
     * @param code 微信用户授权码，由微信发给我们，一般是前端向微信获取用户的授权码，然后再由微信转交给我们
     * @return
     */
    private String getOpenid(String code){
        HashMap<String, String> map = new HashMap<>();
//  调用微信接口服务，获得当前微信用户的openid
        map.put("appid", weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code", code);//微信用户的授权码
        map.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);//返回时
        log.info("获取到微信用户的数据：{}",json);//session_key 会话密钥session_key和用户唯一标识openid
// todo com.alibaba.fastjson.JSON 在java中转换json对象
        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;
    }
}
